If your system has integrated Witty Pi 3’s software and you have called the functions in utilities.sh file.
You will need to compare the two versions of utilities.sh files and make sure all functions you use
are still there. We try not to change the function names, but there are some functions get
added/removed.
If your system also directly accesses Witty Pi 3 via I2C interface, you will need to change the I2C
address and register indexes accordingly. Witty Pi 3 exposes two I2C devices to the bus (address
0x68 and 0x69), while Witty Pi 4 exposes only one I2C devices to the bus (default address is 0x08,
can be changed). In Witty Pi 4, the I2C registers in RTC and temperature sensor are mapped to
virtual I2C registers in single device. Please refer the “What I
2
C Registers are provided by Witty Pi 4”
section for more information.
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